Fix failing build with pypy on Travis

Author: KostyaEsmukov

.travis/run.sh

@@ -6,7 +6,7 @@ set -x
 if [[ "$TEST_RELEASE" == true ]]; then
     py.test test_release.py
 else
-    if [[ $TRAVIS_PYTHON_VERSION == pypy ]]; then
+    if [[ $TRAVIS_PYTHON_VERSION == pypy* ]]; then
         py.test test/
     else
         coverage run -m py.test test/